Hyundai Elantra: Engine Control System / Heated Oxygen Sensor (HO2S) Repair procedures
| 1. |
Turn the ignition switch OFF. |
| 2. |
Disconnect the HO2S connector. |
| 3. |
Measure resistance between the HO2S terminals 2 and 5 [B1/S1].
Measure resistance between the HO2S terminals 3 and 4 [B1/S2]. |
| 4. |
Check that the resistance is within the specification.
Specification : Refer to "Specification"
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| 1. |
Turn the ignition switch OFF and disconnect the battery negative (-) cable. |
| 2. |
Disconnect the connector (A), and then remove the sensor (B).
| • |
Note that the SST (Part No.: 09392-2H100) is useful when removing the heated oxygen sensor. |
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[Bank 1 / Sensor 1] 
[Bank 1 / Sensor 2] 
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| • |
Install the component with the specified torques. |
| • |
Note that internal damage may occur when the component is dropped. In this case, use it after inspecting. |
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| • |
DON’T use a cleaner, spray, or grease to sensing element and
connector of the sensor because oil component in them may malfunction
the sensor performance. |
| • |
Sensor and its wiring may be damaged in case of contacting
with the exhaust system (Exhaust Manifold, Catalytic Converter, and so
on).
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| 1. |
Installation is reverse of removal.
Heated oxygen sensor installation :
39.2 ~ 49.1 N.m (4.0 ~ 5.0 kgf.m, 28.9 ~ 36.2 lb-ft)
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Description
Accelerator Position Sensor (APS) is installed on the
accelerator pedal module and detects the rotation angle of the
accelerator pedal. The APS is one of the most important sensors ...
Heated Oxygen Sensor (HO2S) Schematic Diagrams
Accelerator Position Sensor (APS) Description and Operation